Which component is used to collect wastewater in a gravity flow system?

In a gravity flow system, the component used to collect wastewater is the gravity influent line. This line is designed to use gravitational force to channel wastewater from collection points, like homes or businesses, directly into the treatment facility. The slope of the line allows for natural flow without requiring pumps, making it an efficient and cost-effective method for transporting wastewater.

The gravity influent line typically consists of pipes that are laid out at a slight incline, which facilitates effortless movement of wastewater by gravity. This mechanism is crucial for the initial stage of wastewater treatment as it allows for the accumulation of waste in the treatment plant efficiently.

In contrast, a lift station is designed to pump wastewater when gravity flow is not feasible due to elevation changes. A direct discharge pipeline usually refers to a different aspect of wastewater management, often linked to the final disposal of treated effluent. The sludge tank is meant for holding solids that have settled out during the treatment process and is not involved in wastewater collection but rather in the handling of byproducts.